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ASSE 1082-2021
Performance Requirements for Water Heaters with Integral Temperature Control Devices for Hot Water Distribution Systems
For water heaters with defined setpoint controls under various steady state flow conditions. These water heaters control the outlet temperature to specific limits and are installed within a hot water distribution system, but not at point-of-use. The water heater shall consist of a heat exchanger, a cold water inlet connection, a hot water outlet connection, and a means for precisely governing the outlet temperature. The device controller shall be listed to the appropriate electrical safety standard in accordance with the device category.
American Society of Sanitary Engineering [asse-sanitary]